The disorder whereby a girl may be calm and fun to talk to one day, and be an utter bitch the next day. Acts of kindness include offers of help and general pleasantness, while acts of bitchiness may include apparent constant ragging and hurling sharp objects.
The mood of which may be shown as a pattern of two bitchy days and one good day.
Named after the victim of the first recognized case: Jannika.
"Did you talk to that new girl yet?"

"Nope, not yet. She's on day 2 of bitchiness"

"What do you mean?"

"She has Jannikism"

"Oh, gotcha"
by lysdexic loof November 11, 2008
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Jannik is a noble, forthright, kind and trustworthy human being.

Bees, dogs, cats and squirrels love him.

This charming and handsome man always has an elegant and moderate demeanour, a huge heart and a clever and fair response to daily life matters.
My beloved Jannik is a treasured friend and partner.
by Chamaemelum_nobile June 27, 2019
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Absolute titan.
Poker king, late night chat stealth ninja. The most incredible young man ever. He also likes noodle.
"Dude, did you hear about Jannik?"
"Yeah I heard his muscles ripple like transverse waves"

"Jannik is my absolute favourite"
by gaysmileyface March 7, 2010
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Jannik is a person who could make you cry out of laughing and cringe due to his jokes at the same time. However he is probably one of the funniest people you’ll ever meet. Moreover he’s terrible at losing- HE ALWAYS HAS TO WIN. But this isn’t necessarily a terrible trait because it shows that he is incredibly ambitious and determined and therefore he has a great potential of achieving his goals.

When you get to know him, you’ll quickly realise that he’s unbelievably talkative and cannot get his mouth shut. He always wants everything to be perfect and gets nervous if something doesn’t work out as planned.

But most importantly, there is also another part of Jannik that is much deeper. He is a luminous person: when you see him, you have to smile.

There are so many positive adjectives that could describe him: unbelievably understanding, sexually and emotionally attractive, open-minded, adroit and intelligent. But words are not sufficient to describe him as a person.
Nobody:

Me: Jannik is a leek. But with a great heart and a mediocre humour.
by discreet smooch July 19, 2020
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Jannik is probably Belgian. He's the best guy in the whole world - in fact surpassing all other specimens of the male population. He's sweet, caring, charming, amazing, smart, understanding, intelligent and a great listener. He may have a slightly random sense of humor, but it only adds to his charm. He has striking good looks although he may be the last person to realize it himself. An all around beautiful person that anyone would be privileged to know and call a friend. To any woman who is fortunate to be with a Jannik, he is also the most awesome boyfriend on earth. If you are a female dating a Jannik you're lucky.
Girl 1: Look this hot biy over there. What's his name?
Girl 2: That's Jannik. The hottest boy at school, AND my boyfriend.
Girl 1: Oh sorry, you're lucky. Such a great boy.
Girl 2: I know
by forevertwentyone December 30, 2016
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A Jew that denies it. Likes the holiday Hannike.
She is so Jannike!
by HP&CO December 6, 2010
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A boy that games everyday and all day. He is sweet and funny but can't really be empathetic. He wants to speak his mind but hates confrontation so he just sarcastically disses people. If Jannik likes you, he'll be one of the best friends ever and have your back. With his friends he's loud and fun and it's easy to make him laugh. Jannik will not take shiteu from anyone. He'll protect you in his own way and loves food and anime. Jannik is one of the best boys ever!Keep him!
Bro. He's hella funny, must be a Jannik.
An OSU King? Clearly a Jannik.
by Justarandyrandom May 11, 2020
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